https://git.reactos.org/?p=reactos.git;a=commitdiff;h=01b580d8760be6870964ecd7b18ae2fab5fa250f
commit 01b580d8760be6870964ecd7b18ae2fab5fa250f Author: Pierre Schweitzer <pie...@reactos.org> AuthorDate: Mon Dec 31 20:33:59 2018 +0100 Commit: Pierre Schweitzer <pie...@reactos.org> CommitDate: Mon Dec 31 20:35:17 2018 +0100 [WIN32K] Deny deviceless calls to EngDeviceIoControl This fixes BSOD happening in ntoskrnl coming from win32k under certain conditions with 3rd party display drivers (such as VBox or VMware) --- win32ss/gdi/eng/device.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/win32ss/gdi/eng/device.c b/win32ss/gdi/eng/device.c index 0123a2713c..6d20e30de5 100644 --- a/win32ss/gdi/eng/device.c +++ b/win32ss/gdi/eng/device.c @@ -485,6 +485,11 @@ EngDeviceIoControl( TRACE("EngDeviceIoControl() called\n"); + if (!hDevice) + { + return ERROR_INVALID_HANDLE; + } + KeInitializeEvent(&Event, SynchronizationEvent, FALSE); DeviceObject = (PDEVICE_OBJECT) hDevice;